Using ci-phpunit-test for Multiple Projects

The ci-phpunit-test library is great, but I am looking for a way for multiple projects to share it so that I don't have to add over 900 files to each project. Ideally, it would sit in a shared location and each project would just have the files with the unit tests for that project.
I'd appreciate advice on handling this.

https://kenjis.github.io/ci-phpunit-test